package com.group6.exam.common.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 编码格式过滤器
 * 
 * @author Administrator
 *
 */
public class EncodingFilter implements Filter {

	private String encode;
	
	@Override
	public void destroy() {

	}

	@Override
	public void doFilter(ServletRequest req, ServletResponse resp,
			FilterChain chain) throws IOException, ServletException {
		
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) resp;
		
		// 设置编码格式
		request.setCharacterEncoding(encode);
		response.setCharacterEncoding(encode);
		response.setContentType("text/html; charset=" +encode);
		
		chain.doFilter(request, response);
	}

	@Override
	public void init(FilterConfig config) throws ServletException {
		this.encode = config.getInitParameter("encode");
	}

}
